diff --git a/buildbot/master.cfg b/buildbot/master.cfg
index 189628ee..bbe8bbad 100644
--- a/buildbot/master.cfg
+++ b/buildbot/master.cfg
@@ -194,28 +194,36 @@ def makeTriggerFactory():
 regularBuilders = [ 'build-osx-py36',
                     'build-osx-py37',
                     'build-osx-py38',
+                    'build-osx-py39',
                     'build-gtk2-py36',
                     'build-gtk2-py37',
                     'build-gtk2-py38',
+                    'build-gtk2-py39',
                     'build-gtk3-py36',
                     'build-gtk3-py37',
                     'build-gtk3-py38',
+                    'build-gtk3-py39',
                     'build-win32-py36',
                     'build-win32-py37',
                     'build-win32-py38',
+                    'build-win32-py39',
                     'build-win64-py36',
                     'build-win64-py37',
                     'build-win64-py38',
+                    'build-win64-py39',
                     ]
 distBuilders = [    'dist-osx-py36',
                     'dist-osx-py37',
                     'dist-osx-py38',
+                    'dist-osx-py39',
                     'dist-win32-py36',
                     'dist-win32-py37',
                     'dist-win32-py38',
+                    'dist-win32-py39',
                     'dist-win64-py36',
                     'dist-win64-py37',
                     'dist-win64-py38',
+                    'dist-win64-py39',
                     ]
 otherBuilders = [   'dist-docs-py37',
                     'dist-src-py37',